Evans Onyx series features two plies of 7.5mil film that will deliver enhanced durability while make the drums cut live. A frost coating gives the Onyx heads a matte black appearance and increases low-end response and attack. Evans Level 360 technology is incorporated to extend the level playing surface of the drumhead, 360 degrees around the drum. The vertically enhanced collar design guarantees even contact with the critical bearing edge of the drum shell, resulting in: ease of tuning, extended pitch range and optimum quality of sound. Evans Level 360 technology resolves the age-old dilemma of traditional synthetic heads consistently not fitting the drum shell without using considerable force. For over 60 years, Evans has been an innovator in drumhead manufacturing and design. As the creator of the first synthetic drumhead and other revolutionary products such as EMAD, Hydraulics, and the UV1 series, Evans drumheads are designed with the intent of solving problems for drummers. Regarded for high quality and consistency all Evans drumheads are made in the USA and feature Level 360 Technology., 13" drum head made using two plies of 7.5mil film, Two plies offer consistency and durability for longer playing time, A frost coating gives the Onyx heads a matte black appearance and increases low-end response and attack, The Onyx tom heads are the perfect aesthetic and sonic compliment to the Onyx bass heads and Onyx bass resonant, All Evans drum heads are designed, engineered and manufactured in the USA.BROUGHT TO YOU BY WILD BILLS DRUM SHOP OF TEXAS!